Electromethes, Kazantsev, Sergey V., 2012

Kazantsev, Sergey V., 2012, New omethid and lampyrid taxa from the Baltic Amber (Insecta: Coleoptera), Zootaxa 3186, pp. 59-63 : 59-61

Electromethes gen. n.

Type species: Electromethes alleni sp. n.

Description. Adult male. Alate, flattened, elongate ( Fig. 1 ). Head transverse, exposed. Eyes moderately large, spherical. Labrum conspicuous, sclerotised, located anteriad of clypeus. Palps small, slender; ultimate palpomeres securiform. Gula transverse ( Fig. 3 ). Antennal sockets separated by ca. their diameter. Antenna 11-segmented, moderately long, antennomeres 4–10 flabellate; pedicel (antennomere 2) short, subequal in length and width to antennomere 3 and considerably shorter than subsequent antennomeres; pubescence on antennomeres 3–11 short and decumbent ( Fig. 2 ).

Pronotum transverse, narrowed and rounded anteriorly, with punctate convex disk, explanate sides and almost straight posterior angles ( Figs 1–2 ). Prosternum triangular ( Fig. 3 ). Scutellum elongate, rounded at apex ( Fig. 1 ). Discrimen complete, bifurcate near mesoventrite. Elytra elongate, flattened, slightly broadening posteriorly, densely punctate, with inconspicuous longitudinal costae, pubescence short and decumbent ( Fig. 1 ). Epipleuron absent. Metathoracic wings fully developed.

Legs relatively short and robust; hind coxae contiguous; trochanters short; femurs and tibiae straight, tibiae noticeably longer than femurs, almost non-widened distally; tarsomeres 1–4 slightly widened, with plantar pads; claws simple, shortly appendiculate at base.

Abdomen with eight ventrites; exposed portion of ultimate ventrite small, transverse, rounded at apex; ventrites without photic organs. Aedeagus with laterally exposed outside sternite 9 parameres ( Fig. 3 ). Female. Unknown.

Diagnosis. Electromethes gen. n. is easily distinguishable from other omethids by a combination of the following characters: more prominent and more sclerotised labrum, securiform ultimate palpomeres, non-flabellate antennomere 3, location of the bases of flabellae of antennomeres 4–10 at the apices of antennomeres ( Fig. 1 ), triangular prosternum ( Fig. 3 ), absent elytral epipleuron, present plantar pads on tarsomeres 1–2 ( Fig. 3 ), etc.

Etymology. The name of the new genus is derived from "electron", the Greek for "amber", and the genus name " Omethes ". Gender masculine.

Figures

FIGURES 1 – 3. General view of Electromethes alleni gen. n., sp. n., holotype male. 1 — dorsally; 2 — same, latero-dorsally; 3 — same, ventrally.